Defacement of currency is a violation of Title 18, Section 333 of the United States Code. Under this provision, currency defacement is generally defined as follows: Whoever mutilates, cuts, disfigures, perforates, unites or cements together, or does any other thing to any bank bill, draft, note, or other evidence of debt issued by any national banking association, Federal Reserve Bank, or Federal Reserve System, with intent to render such item(s) unfit to be reissued, shall be fined under this title or imprisoned not more than six months, or both.

Defacement of currency in such a way that it is made unfit for circulation comes under the jurisdiction of the United States Secret Service. The United States Secret Service web address is www.secretservice.gov.

So you can’t….

Mutilate

Cut

Disfigure

Perforate

Unite

Cement together…

….currency. But it doesn’t say anything about “writing” on it. These are also all sort-of-wishy-wash terms.

However it says you can’t do that stuff with intent to render such item(s) unfit to be reissued.

Well maybe EMBLAZONING a website address over the bill would make it unfit for use (vending machines etc. might not recognize it). So something like this would be bad:

-Or-

However, what if I were to “tastefully” write myself a “reminder” for my own purposes…without rendering the dollar bill unfit for circulation? Perhaps:

Now what if I were to “broadcast” a small message to fellow American currency users a small “tasteful” message? It has no intent of de-valuing the currency in question. It doesn’t create the need for the currency to come out of circulation. Maybe something like:

Hmmmm…..

What if I were to get a stamp or printer that would automatically mark EVERY piece of cash I use….in a “tasteful” way of course ;-)